Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30b87fafdca9d90…

MALICIOUS

PDF

83.9 KB Created: 2021-09-06 19:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 49c712bcdae1337f836eea9c3acedfde SHA-1: 0bb6ce53ee989420ff0a00c3b98f82832c473e8f SHA-256: d30b87fafdca9d900aad03607937bddbd8009f88f164c4c679065e9a94a6f13a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://medvor.ru/uplcv?utm_term=hypertension+symptoms+pdf PDF link annotation
    • http://humanitool.ru/userfiles/file/57421036470.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6c28da7fa86789bea7d2ffcd7783174e/43064280577.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/dalidemefomonogezasit.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hgd30v2pdvsc6avarnj37j3ed5/35789306418.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/42722218775.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/57b27ea95a668f7168c305852fb7fbf0/bugimaxig.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/8mbbvsr9jcjqq53aah7tmk5jjj/97212499418.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/4jle5sc9uchbgp0lv8qe2irbh2/xaram.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/d916a39b9a555567e99d6a6273756e55/72292201812.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/14837694183.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/nilovijowivipafaj.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/45510970733.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/om7bf4iru5hujdvmojaldt7lfi/40070602644.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/tizij.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/dered.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/10391521950.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/82841225406.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/9b5a07fa48c497f630987d7a28c4f021/samenogesovavexodi.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a4d035bf3---vunexa.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607482a40ea44---6552826627.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/90769523886.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/kowokuradivifiregut.pdfIn PDF document text
    • http://mp-journal.com/media/file/puxogopam.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744c05ea8d9---biwavajinivazezobekadupor.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE743 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 16488 bytes
SHA-256: 00a4cb3c7b22b01bc3d6692286feb00b7b65065edb39fd5443d1adddf431373e
font_02_sfnt_off00012a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A13 10556 bytes
SHA-256: e7071da30157d3b2b4f1846b202c3d4e143895002aae030101b85effa9c17db8

Open this report in the interactive analyzer, or submit your own file for analysis.